CN112448125A - Double-frequency directional antenna and unmanned aerial vehicle remote controller - Google Patents

Double-frequency directional antenna and unmanned aerial vehicle remote controller Download PDF

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Publication number
CN112448125A
CN112448125A CN201910804684.3A CN201910804684A CN112448125A CN 112448125 A CN112448125 A CN 112448125A CN 201910804684 A CN201910804684 A CN 201910804684A CN 112448125 A CN112448125 A CN 112448125A
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CN
China
Prior art keywords
antenna
dipole
dual
dipole antennas
frequency
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CN201910804684.3A
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Chinese (zh)
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袁涛
徐伟
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Shenzhen Zhuorui Communication Technology Co ltd
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Shenzhen Zhuorui Communication Technology Co ltd
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Priority to CN201910804684.3A priority Critical patent/CN112448125A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • H01Q21/293—Combinations of different interacting antenna units for giving a desired directional characteristic one unit or more being an array of identical aerial elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole

Abstract

The invention provides a dual-frequency directional antenna and an unmanned aerial vehicle remote controllerThe length direction of the dipole antenna and the length direction of the second dipole antenna are both parallel to the X direction, and the length of the first dipole antenna is 0.5 lambda1The length of the second dipole antenna is 0.5 lambda2The dielectric plate is provided with a symmetrical line arranged along the Y direction, the first dipole antenna and the second dipole antenna are symmetrically arranged by taking the symmetrical line as a central line, and the feed point of the dual-frequency directional antenna is arranged at the edge of the dielectric plate parallel to the X direction. According to the dual-frequency directional antenna and the unmanned aerial vehicle remote controller, the phase of the dipole antenna close to the feeding point is ahead of the phase of the dipole antenna far away from the feeding point, so that the same-frequency dipole antennas form directional radiation pairs respectively, and the low-profile characteristic is guaranteed.

Description

Double-frequency directional antenna and unmanned aerial vehicle remote controller
Technical Field
The invention belongs to the technical field of antennas, and particularly relates to a dual-frequency directional antenna and an unmanned aerial vehicle remote controller.
Background
Civil and military unmanned aerial vehicles have the development trend of miniaturization and high integration level. For example, civil unmanned aerial vehicle antennas are currently in the trend of integrating navigation systems, image transmission systems and remote control systems on the body to achieve better interactive experience. And at present, two frequency bands of the WLAN are used for realizing the control of the remote controller and the unmanned aerial vehicle. In this application scenario, the antenna at the remote control end needs a directional pattern. Since in general the drone and the remote control form a facing relationship. The back side pattern contributes little to the communication system. Therefore, we can generalize that the ideal state of the map above the unmanned aerial vehicle remote controller should be directionally radiated. In addition, because the unmanned aerial vehicle remote controller is small, the space of leaving for the antenna to place is limited, for this reason, need further realize low section under the prerequisite of realizing dual-frenquency directional radiation to reduce the thickness of antenna. At present, two design ideas of the commonly used directional antenna are provided, one is that a plurality of units form an array, and a specific amplitude and a specific phase are fed to achieve the directional radiation characteristic of the array antenna. The disadvantages of this approach are two: firstly, the number of units is large, and great difficulty is caused to the double-frequency design; secondly, the feed network is complex in design. Another way to achieve directional radiation is to use a large metal as a reflector plate to reflect the energy of the backward radiation to the forward direction to form the directional radiation. The disadvantage of this method is that the distance between the reflector and the antenna is generally required to be around a quarter wavelength of the resonant frequency, so that the in-phase superposition of the forward electromagnetic waves is ensured rather than the mutual cancellation, and it is difficult to achieve a low profile characteristic.
Disclosure of Invention
The invention aims to provide a dual-frequency directional antenna to solve the technical problem that the dual-frequency directional antenna in the prior art does not have low profile characteristic.
In order to achieve the purpose, the invention adopts the technical scheme that: a dual-frequency directional antenna is providedHaving a first resonance frequency and a second resonance frequency, the first resonance frequency having a wavelength λ1The wavelength of the first resonance frequency is lambda2The method is characterized in that: the antenna comprises a dielectric plate, two first dipole antennas and two second dipole antennas, wherein the first dipole antennas and the second dipole antennas are arranged on the same side of the dielectric plate, the length direction of the first dipole antennas and the length direction of the second dipole antennas are parallel to the X direction, and the length of the first dipole antennas is 0.5 lambda1The length of the second dipole antenna is 0.5 lambda2The dielectric plate is provided with a symmetrical line arranged along the Y direction, the first dipole antenna and the second dipole antenna are symmetrically arranged by taking the symmetrical line as a central line, and the feed point of the dual-frequency directional antenna is arranged at the edge of the dielectric plate parallel to the X direction.
Further, the first dipole antenna comprises two first strip strips arranged at intervals in the X direction, the second dipole antenna comprises two second strip strips arranged at intervals in the X direction, and the length directions of the first strip strips and the second strip strips are arranged along the X direction.
Further, the dual-band directional antenna further includes two feeding strips, one of the feeding strips connects the first strip and the second strip on the same side of the symmetry line, and the other feeding strip connects the first strip and the second strip on the other side of the symmetry line.
Further, the length directions of the two feed bars are parallel to the Y direction.
Further, a connecting line of one ends, close to the symmetry line, of the first strip and the second strip which are positioned on the same side of the symmetry line is arranged along the Y direction.
Furthermore, one of the first dipole antennas, one of the second dipole antennas, the other of the first dipole antennas and the other of the second dipole antennas are sequentially arranged along the Y direction; alternatively, the first and second electrodes may be,
one of the first dipole antennas, the other of the first dipole antennas, one of the second dipole antennas, and the other of the second dipole antennas are sequentially arranged along the Y direction.
Further, the distance between the two first dipole antennas is 0.25 lambda1And 0.8 lambda1Between two of said second dipole antennas at a distance of 0.25 lambda2And 0.8 lambda2In the meantime.
Further, the length of the first dipole antenna is greater than that of the second dipole antenna, the distance between the two first dipole antennas is greater than that between the two second dipole antennas, and the distance between the first dipole antenna and the two second dipole antennas between the two second dipole antennas is equal.
Further, the first resonance frequency is 2.4GHz, and the second resonance frequency is 5.8 GHz.
The invention also provides an unmanned aerial vehicle remote controller which comprises the dual-frequency directional antenna.
The dual-frequency directional antenna and the unmanned aerial vehicle remote controller provided by the invention have the beneficial effects that: compared with the prior art, the dual-frequency directional antenna comprises the dielectric plate, the two first dipole antennas and the two second dipole antennas, wherein the length of the first dipole antenna is half-wavelength of the first resonant frequency, the length of the second dipole antenna is half-wavelength of the second resonant frequency, and the dual-frequency directional antenna has dual-frequency resonance by arranging the two dipole antennas with different lengths. The feed point of the antenna is arranged at the edge of the dielectric plate parallel to the X direction, so that the distance between each dipole antenna and the feed point is different, the phase of the dipole antenna close to the feed point is ahead of the phase of the dipole antenna far away from the feed point, and thus two first dipole antennas with the same frequency and two second dipole antennas with the same frequency form a directional radiation pair respectively. In the antenna structure, the first dipole antenna and the second dipole antenna are arranged on the same side of the dielectric plate, a reflecting plate is not needed, the thickness of the antenna is small, and the low-profile characteristic is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a front view of a dual-band directional antenna according to an embodiment of the present invention;
fig. 2(a) is a schematic current distribution diagram of a first dipole antenna at a first resonant frequency of a dual-frequency directional antenna provided in an embodiment of the present invention;
fig. 2(b) is a schematic current distribution diagram of a second dipole antenna at a second resonant frequency of the dual-frequency directional antenna provided in the embodiment of the present invention;
fig. 3 is a simulation diagram of an S-parameter performance curve of the dual-band directional antenna according to the embodiment of the present invention;
fig. 4 is a comparison graph of simulation results and experimental results of reflection coefficients of a dual-frequency directional antenna according to an embodiment of the present invention;
fig. 5 is a directional diagram of a dual-band directional antenna at a first resonant frequency according to an embodiment of the present invention;
fig. 6 is a directional diagram of a dual-band directional antenna at a second resonant frequency according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1-a first dipole antenna; 11-a first tape strip; 2-a second dipole antenna; 21-a second tape strip; 3-a dielectric plate; 4-a feeding point; 5-feeding strip.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1, a dual-band directional antenna according to an embodiment of the present invention will be described. The dual-frequency directional antenna has two resonant frequencies, namely a first resonant frequency and a second resonant frequency, wherein the wavelength corresponding to the first resonant frequency is lambda1The second resonant frequency corresponds to a wavelength λ2. In one embodiment, the dual-frequency directional antenna includes a dielectric plate 3, two first dipole antennas 1, and two second dipole antennas 2. The dielectric constant of the dielectric sheet 3 is not limited herein, and may be selected from 2.2, 3.66, and the like. The dielectric plate 3 has a symmetry line arranged along the Y direction, and the two first dipole antennas 1 and the two second dipole antennas 2 are symmetrically arranged with the symmetry line as a center line. The length direction of the first dipole antenna 1 and the length direction of the second dipole antenna 2 are both parallel to the X direction, that is, the first dipole antenna 1 and the second dipole antenna 2 are arranged in parallel. Length of the first dipole antenna 1 and the second dipole antennaThe length of the wire 2 is different so that the antenna can resonate at two different frequencies, forming a dual frequency resonance. Accordingly, the length of the first dipole antenna 1 is 0.5 λ1The length of the second dipole antenna 2 is 0.5 lambda2The antenna is enabled to operate at a first resonant frequency and a second resonant frequency. The feed point 4 of the dual-band directional antenna is arranged at the edge of the dielectric plate 3 parallel to the X direction, specifically, the feed point 4 may be arranged on the dipole antenna at the outermost end in the Y direction, and the distance between the dipole antenna and the edge of the dielectric plate 3 in the Y direction is the smallest. Thus, the distances between the dipole antennas (the first dipole antenna 1 and the second dipole antenna 2) and the feeding point 4 are different, the phase of the dipole antenna close to the feeding point 4 is earlier than that of the dipole antenna far from the feeding point 4, and by properly adjusting the distances between the dipole antennas, the antennas with the same frequency can form a directional radiation pair, so that the directional radiation pair has a directional radiation characteristic. The first dipole antenna 1 and the second dipole antenna 2 are both arranged on the same side of the dielectric plate 3, and the thickness of the dual-frequency directional antenna is thinner, is approximately the same as that of the dielectric plate 3, occupies a smaller space, and has a low-profile characteristic.
The dual-frequency directional antenna in the above embodiment includes a dielectric plate 3, two first dipole antennas 1, and two second dipole antennas 2, where the length of the first dipole antenna 1 is a half-wavelength of the first resonant frequency, and the length of the second dipole antenna 2 is a half-wavelength of the second resonant frequency, and the antenna has dual-frequency resonance by providing two dipole antennas with different lengths. The feed point 4 of the antenna is arranged at the edge of the dielectric plate 3 parallel to the X direction, so that the distance between each dipole antenna and the feed point 4 is different, the phase of the dipole antenna close to the feed point 4 is ahead of the phase of the dipole antenna far away from the feed point 4, and thus two first dipole antennas 1 with the same frequency and two second dipole antennas 2 with the same frequency form a directional radiation pair respectively. In the antenna structure, the first dipole antenna 1 and the second dipole antenna 2 are arranged on the same side of the dielectric plate 3, a reflecting plate is not needed, the thickness of the antenna is small, and the low-profile characteristic is guaranteed.
Referring to fig. 1, in one embodiment, the first dipole antenna 1 includes two first strips 11 spaced apart in the X direction, and the second dipole antenna 2 includes two second strips 21 spaced apart in the X direction, so that the dual-frequency directional antenna has four first strips 11 and four second strips 21, which form a pair of first dipole antennas 1 and a pair of second dipole antennas 2. In the same first dipole antenna 1, the symmetry line is arranged between the two first strips 11; in the same second dipole antenna 2, the symmetry line is arranged between the two second strip bars 21, so that the first dipole antenna 1 and the second dipole antenna 2 are symmetrically arranged by taking the symmetry line as a central line.
Referring to fig. 1, in one embodiment, the dual-band directional antenna further comprises two feeding strips 5, wherein one feeding strip 5 connects the first strip 11 and the second strip 21 on the same side of the symmetry line, such that the first strip 11 and the second strip 21 on the same side of the symmetry line are connected in series, and the other feeding strip 5 connects the first strip 11 and the second strip 21 on the other side of the symmetry line, such that the first strip 11 and the second strip 21 on the other side of the symmetry line are connected in series. The edge between the two feed strips 5 and close to the dielectric plate 3 parallel to the X direction is the feed point 4, one feed strip 5 is connected with the positive electrode of the power supply, and the other feed strip 5 is connected with the negative electrode of the power supply, and feeds power to the first dipole antenna 1 and the second dipole antenna 2.
As shown in fig. 2, fig. 2 is a current distribution diagram of the dual-frequency directional antenna when feeding. Fig. 2(a) is a schematic diagram of the current distribution of the first dipole antenna 1 when the dual-frequency directional antenna resonates at the first resonant frequency; fig. 2(a) is a schematic diagram of the current distribution of the second dipole antenna 2 when the dual-frequency directional antenna resonates at the second resonant frequency. Wherein the direction of the arrow represents the direction of the current and the length of the arrow represents the magnitude of the current. Thus, the dual-frequency directional antenna can work normally at the first resonant frequency and the second resonant frequency respectively.
Further, the length directions of the two feeding strips 5 are parallel to the Y direction, and the feeding strips 5 are connected to the ends of the first strip 11 and the second strip 21, that is, a connecting line of the ends of the first strip 11 and the second strip 21 on the same side of the symmetry line, which are close to the symmetry line, is arranged along the Y direction, so that the current distribution of the first strip 11 and the second strip 21 is as shown in fig. 2.
Referring to fig. 1, in one embodiment, one of the first dipole antennas 1, one of the second dipole antennas 2, the other first dipole antenna 1, and the other second dipole antenna 2 are sequentially disposed along the Y direction; or, one of the first dipole antennas 1, the other of the first dipole antennas 1, one of the second dipole antennas 2, and the other of the second dipole antennas 2 are sequentially disposed along the Y direction. The influence between the first dipole antenna 1 and the second dipole is small. When the first dipole antenna 1 resonates, the second dipole antenna 2 is in a high-impedance state. When the second dipole antenna 2 resonates, the first dipole antenna 1 is in a high-impedance state.
More specifically, when one of the first dipole antennas 1, one of the second dipole antennas 2, the other first dipole antenna 1, and the other second dipole antenna 2 are sequentially disposed along the Y direction, the size of the dual-band directional antenna in the Y direction is smaller, and the volume of the dual-band directional antenna can be further reduced.
In one embodiment, the distance between the two first dipole antennas 1 is 0.25 λ1And 0.8 lambda1Between two second dipole antennas 2 at a distance of 0.25 lambda2And 0.8 lambda2Meanwhile, the amplitude of the energy fed by the first dipole antenna 1 and the second dipole antenna 2 is larger. The distance between the two first dipole antennas 1 refers to the distance between the two first dipole antennas 1 in the Y direction, and the distance between the two second dipole antennas 2 refers to the distance between the two first dipole antennas 1 in the Y direction.
More specifically, when one first dipole antenna 1, one second dipole antenna 2, the other first dipole antenna 1 and the other second dipole antenna 2 are sequentially arranged along the Y direction, and the length of the first dipole antenna 1 is greater than that of the second dipole antenna 2, the first resonance frequency is smaller than the second resonance frequency, the distance between the two first dipole antennas 1 is greater than that of the two second dipole antennas 2, and the distances between the first dipole antenna 1 and the two second dipole antennas 2 arranged between the two second dipole antennas 2 are equal to each other, so that the dual-frequency directional antenna can ensure a smaller size in the Y direction and can act as effectively as possible through interference between the first dipole antenna 1 and the second dipole antennas 2.
Referring to fig. 3, fig. 3 is a simulation diagram of S-parameter performance curve of the dual-band directional antenna in fig. 1, where the dimension units in fig. 1 are millimeters, the widths of the first strip 11 and the second strip 21 are the same, the abscissa in fig. 3 is frequency, and the ordinate is reflection coefficient S11. It can be seen from fig. 3 that the gain of the dual-frequency directional antenna is greater than 5dBi when the first resonant frequency is 2.4GHz and the second resonant frequency is 5.8 GHz.
Referring to fig. 4, fig. 4 is a graph comparing simulation results and experimental results of the reflection coefficient of the dual-band directional antenna of fig. 1, where the abscissa of fig. 4 is frequency and the ordinate is reflection coefficient (dB). As can be seen from fig. 4, the curve trend of the simulation result is the same as that of the experimental result, the reflection coefficient values are similar, and the experimental result verifies the simulation result, so that the dual-frequency directional antenna can be proved to have higher gain at 2.4GHz and 5.8 GHz.
Referring to fig. 5 and 6, fig. 5 is a directional diagram of the dual-band directional antenna of fig. 1 at 2.4GHz and in the YOZ plane, and fig. 6 is a directional diagram of the dual-band directional antenna of fig. 1 at 5.8GHz and in the YOZ plane. As can be derived from fig. 5 and 6, the dual-frequency directional antenna in fig. 1 has a dual-frequency directional radiation characteristic.
The invention also provides an unmanned aerial vehicle remote controller which comprises the dual-frequency directional antenna in any embodiment, and the dual-frequency directional antenna is arranged inside the unmanned aerial vehicle remote controller.
The unmanned aerial vehicle remote controller adopts the above dual-frequency directional antenna, and the dual-frequency directional antenna includes dielectric plate 3, two first dipole antennas 1 and two second dipole antennas 2, and the length of first dipole antenna 1 is the half-wavelength of first resonant frequency, and the length of second dipole antenna 2 is the half-wavelength of second resonant frequency, through setting up the dipole antennas of two kinds of different length, makes this antenna have dual-frequency resonance. The feed point 4 of the antenna is arranged at the edge of the dielectric plate 3 parallel to the X direction, so that the distance between each dipole antenna and the feed point 4 is different, the phase of the dipole antenna close to the feed point 4 is ahead of the phase of the dipole antenna far away from the feed point 4, and thus two first dipole antennas 1 with the same frequency and two second dipole antennas 2 with the same frequency form a directional radiation pair respectively. In this antenna structure, first dipole antenna 1 and second dipole antenna 2 all locate dielectric plate 3 with one side, need not to use the reflecting plate, and the thickness of antenna is less, guarantees low profile characteristic, reduces the shared volume of dual-frenquency directional antenna to can reduce the volume of unmanned aerial vehicle remote controller.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A dual-frequency directional antenna having a first resonance frequency and a second resonance frequency, the first resonance frequency having a wavelength λ1The wavelength of the first resonance frequency is lambda2The method is characterized in that: the antenna comprises a dielectric plate, two first dipole antennas and two second dipole antennas, wherein the first dipole antennas and the second dipole antennas are arranged on the same side of the dielectric plate, the length direction of the first dipole antennas and the length direction of the second dipole antennas are parallel to the X direction, and the length of the first dipole antennas is 0.5 lambda1The length of the second dipole antenna is 0.5 lambda2The dielectric plate is provided with a symmetrical line arranged along the Y direction, the first dipole antenna and the second dipole antenna are symmetrically arranged by taking the symmetrical line as a central line, and the feed point of the dual-frequency directional antenna is arranged at the edge of the dielectric plate parallel to the X direction.
2. The dual-band directional antenna of claim 1, wherein: the first dipole antenna comprises two first strip strips which are arranged at intervals in the X direction, the second dipole antenna comprises two second strip strips which are arranged at intervals in the X direction, and the length directions of the first strip strips and the second strip strips are arranged along the X direction.
3. A dual-band directional antenna as claimed in claim 2, wherein: the dual-frequency directional antenna further comprises two feed strips, wherein one feed strip is connected with the first strip and the second strip which are positioned on the same side of the symmetry line, and the other feed strip is connected with the first strip and the second strip which are positioned on the other side of the symmetry line.
4. A dual-band directional antenna as claimed in claim 3, wherein: the length directions of the two feed bars are parallel to the Y direction.
5. A dual-band directional antenna as claimed in claim 2, wherein: and a connecting line of one ends, close to the symmetry line, of the first strip and the second strip which are positioned on the same side of the symmetry line is arranged along the Y direction.
6. The dual-band directional antenna of claim 1, wherein: one of the first dipole antennas, one of the second dipole antennas, the other of the first dipole antennas and the other of the second dipole antennas are sequentially arranged along the Y direction; alternatively, the first and second electrodes may be,
one of the first dipole antennas, the other of the first dipole antennas, one of the second dipole antennas, and the other of the second dipole antennas are sequentially arranged along the Y direction.
7. The dual-band directional antenna of claim 6, wherein: the distance between the two first dipole antennas is 0.25 lambda1And 0.8 lambda1Between two of said second dipole antennas at a distance of 0.25 lambda2And 0.8 lambda2In the meantime.
8. A dual-band directional antenna as claimed in claim 7, wherein: the length of the first dipole antenna is greater than that of the second dipole antenna, the distance between the two first dipole antennas is greater than that of the two second dipole antennas, and the distance between the first dipole antenna and the two second dipole antennas between the two second dipole antennas is equal.
9. A dual frequency directional antenna according to any one of claims 1 to 8, characterized in that: the first resonant frequency is 2.4GHz, and the second resonant frequency is 5.8 GHz.
10. Unmanned aerial vehicle remote controller, its characterized in that: comprising a dual frequency directional antenna according to any one of claims 1-9.
CN201910804684.3A 2019-08-28 2019-08-28 Double-frequency directional antenna and unmanned aerial vehicle remote controller Pending CN112448125A (en)

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CN112448125A true CN112448125A (en) 2021-03-05

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US20030231138A1 (en) * 2002-06-17 2003-12-18 Weinstein Michael E. Dual-band directional/omnidirectional antenna
JP2004165942A (en) * 2002-11-13 2004-06-10 Denki Kogyo Co Ltd Two-frequency common antenna system
CN1802772A (en) * 2003-02-28 2006-07-12 香港应用科技研究院有限公司 Multiband branch radiator antenna element
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